I am having problems tuning carbs on this ski.Machine is box stock. I run at 6500' altitude and have jetted down to recommendation from service manual.
I am thinking about installing a Jetworks flow control valve in the exhaust. has anyone done this and where does the valve go in the system.

Symptom are, boggy when accellerating, like its loaded up, after changing main jets down for altitude and installing carb kits, now it wont idle for longer than a few seconds with out dieing, must choke to start up. Pop-off is around 20 on all three carbs.

Any help would be appreciated.